roller



UNITED VcGTATES PATENT OFFICE.

SAML. MILLER AND GEO. ROLLER, OF CARROLL COUNTY, MARYLAND. i

'IEMIERING- CLAY.

Specification of Letters Patent No. 4,676, dated July 31, 1846.

To all whom z' may concern.'

Be it known that we, SAMUEL MILLER and GEORGE ROLLER, of the county of Carroll and State Of Maryland, haveinvented a new and useful Machine for the Cleansing -and Preparation Of Potters Clay, and that lbe twelve feet (12) long six inches (6) thick, by twelve inches (l2) wide; the posts B B, C, should be about eight feet (8) long and about four-inches square (4); the remaining posts D D, E E of the same length but stronger, (say six inches square) these seven posts should be firmly mortised into the sills as represented in the drawing. Upon a strong plank platform three inches thick lettered P and let into grooves cut into the posts D D E E, which for the sake of distinction we call the press posts, is fastened by four bolts Orscrews (two of which a a are seen in the drawing) the screen box N. This box should be from eight to twelve inches by about six inches deep, should be made Of iron and sufficiently strong. The screen O, forms the bottom of this box.

iron and be perforated by a great number of holes (say from twelve hundred to fteen The screen should also be'of,

hundred in a screen Of the above mentioned size) sufficiently small to prevent the passage Of such gravel, &c., as would render the clay unfit for the manufacture Of earthen ware. Working tO the bottom of the screen box and rising above it in a manner hereafter describedwe construct a follower K corresponding in size to the` inside of the iron box N. The lower surface Of the fol lower should be faced with an iron plate S. The perpendicular direction of K is maintained by means of an arm 7c which passes through the planks L L, which planks are grooved into the upper part Of the press posts D D, E E.v Attached to the follower by means of arm M is the lever F worked by means Of a rope G G passing over a pulley H in the upper sill of the frame and thence is fastened to a windlass I attached tO the posts B B, and worked by the bar or lever J. If now the screen box N be filled with potters earth Or clay, after it has" passed through the mill usually made use of to crush it having been softened by the addition Of-water, and power be applied to the follO-wer by means of the machinery heretofore described the clay will be forced through the holes in the screen cleansed and y 

